Even in the UK where the horse market is probably better that in the US you would be looking at £500 MAXIMUM, probably less.
I paid a fortune for my coloured youngster but he is a warmblood and is going to be my HOYS horse! A young TB who isnt broken, well there are hundreds of them flooding the market and there are hundreds more that have been broken in.,
Hey Sunny, what a cutie she is! OK, I have a slightly different perspective...
I agree with everyone that she doesn't hold much value right now. However, in a couple of years and with some good training under her belt (girth?) she will be worth MORE than the market average as she is a nice TB that has NOT seen the racetrack.
Take your mother to an auction and let her see how badly the horses are going for. That should convence her. You can also do a search on one of the horse web pages for sale horses semaler to yours and see what comes up.